Izvorni znanstveni članak
https://doi.org/10.15177/seefor.25-17
The Different Timing of Exposure to Drought Stress Differentially Affects Phenology and Growth in Goat Willow
Marko Bačurin
orcid.org/0009-0002-7034-5824
; University of Zagreb, Faculty of Forestry and Wood Technology, Forest Genetics, Dendrology and Botany Department; Svetošimunska cesta 23, HR-10000 Zagreb, Croatia
*
Ivica Čehulić
orcid.org/0009-0004-9287-8183
; Croatian Forest Research Institute, Nursery Production Department, Cvjetno naselje 41, HR-10450 Jastrebarsko, Croatia
Ida Katičić Bogdan
; University of Zagreb, Faculty of Forestry and Wood Technology, Forest Genetics, Dendrology and Botany Department; Svetošimunska cesta 23, HR-10000 Zagreb, Croatia
Saša Bogdan
orcid.org/0000-0002-1672-2038
; University of Zagreb, Faculty of Forestry and Wood Technology, Forest Genetics, Dendrology and Botany Department; Svetošimunska cesta 23, HR-10000 Zagreb, Croatia
* Dopisni autor.
Sažetak
Periods of drought can substantially alter the phenology of forest tree species, influencing growth dynamics as well as the timing of budburst and leaf senescence. This study investigated whether the plant response varies depending on when during the growing season drought stress occurs.
Female individual of goat willow (Salix caprea L.) was propagated by hardwood cuttings, resulting in 151 ramets assigned to eight experimental groups. Seven groups were subjected to drought treatments at different intervals between early March and mid-July 2021, while the eighth served as a well-watered control. The same treatment schedule was repeated in 2022 with increased drought intensity. Each plant remained under drought conditions until visible stress symptoms appeared, and the total mass (container included) decreased to about half of its initial value, after which plants were rehydrated and irrigated regularly for the rest of the season. Control plants were watered continuously.
During autumn 2021, the onset of leaf senescence in the first treatment group was delayed by four days compared with the control. By the following spring (2022), this group flushed about five days earlier than the control, whereas groups 6 and 7 flushed approximately two days later. In autumn 2022, all drought-treated groups showed delayed leaf senescence, most notably those exposed later in the season—by up to 30 days on average compared to the control. These results indicate that the timing of drought stress strongly modulates leaf phenology in Salix caprea, exerting both beneficial and adverse effects on height growth and flower development.
Ključne riječi
Salix caprea L.; phenological changes; drought stress; flowering; growth
Hrčak ID:
340839
URI
Datum izdavanja:
31.12.2025.
Posjeta: 182 *